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@aztec/kv-store

v5.0.1

Published

The Aztec KV store is an implementation of a durable key-value database with a pluggable backend.

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Links

Maintainers

zac-williamsonzac-williamsonleilawangleilawangcharlielyecharlielyejaosefjaosefjoss-aztecprotocoljoss-aztecprotocolludamadludamad

Keywords

Readme

KV Store

The Aztec KV store is an implementation of a durable key-value database with a pluggable backend.

This package exports a number of primitive data structures that can be used to build domain-specific databases in each node component (e.g. a PXE database or an Archiver database). The data structures supported:

  • singleton - holds a single value. Great for when a value needs to be stored but it's not a collection (e.g. the latest block header or the length of an array)
  • array - works like a normal in-memory JS array. It can't contain holes and it can be used as a stack (push-pop mechanics).
  • map - a hashmap where keys can be numbers or strings
  • multi-map - just like a map but each key holds multiple values. Can be used for indexing into other data structures

Backend selection

The backend is selected at import time, you import createStore (and friends) from the entrypoint you want:

  • @aztec/kv-store/lmdb-v2: server / Node. The current default for node components.
  • @aztec/kv-store/lmdb: the legacy LMDB backend, backed by lmdb-js.
  • @aztec/kv-store/sqlite-opfs: the recommended browser backend, encryption-at-rest capable, backed by SQLite over the Origin Private File System (OPFS).
  • @aztec/kv-store/deprecated/indexeddb: deprecated browser backend, backed by IndexedDB. New browser code must use @aztec/kv-store/sqlite-opfs, as this backend is on its way to being fully deprecated.